I just purchased an 8500 today. And that's the first function I sought out. It's very easy.. As long as XP/8500 is recognizing both cards, simply check the box that says 'Extend this monitor' or something like that in the Control Panel/Display Settings. Simply move your DVD/MS Office into the other screen, and maximize your movie Works great for me, I even can set two different resolutions in both monitors, but bewarned, on my 1ghz machine, I get a little pixelation on the screen that i'm showing a DVD.